EP2746751A1 - Dispositif de surveillance optique d'un paramètre d'un échantillon de liquide - Google Patents

Dispositif de surveillance optique d'un paramètre d'un échantillon de liquide Download PDF

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Publication number
EP2746751A1
EP2746751A1 EP13196915.6A EP13196915A EP2746751A1 EP 2746751 A1 EP2746751 A1 EP 2746751A1 EP 13196915 A EP13196915 A EP 13196915A EP 2746751 A1 EP2746751 A1 EP 2746751A1
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EP
European Patent Office
Prior art keywords
measuring
light source
measuring chamber
optical
photodetector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13196915.6A
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German (de)
English (en)
Inventor
Martin Brandl
Andrea Straub
Roland Koch
Karlheinz Kellner
Thomas Posnicek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEELCON GMBH
Original Assignee
Zentrum fur Biomedizinische Technologie Der Donau- Universitat Krems
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE201210112541 external-priority patent/DE102012112541A1/de
Priority claimed from AT505982012A external-priority patent/AT513774B1/de
Application filed by Zentrum fur Biomedizinische Technologie Der Donau- Universitat Krems filed Critical Zentrum fur Biomedizinische Technologie Der Donau- Universitat Krems
Publication of EP2746751A1 publication Critical patent/EP2746751A1/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274—Calibration, base line adjustment, drift correction
    • G01N21/276—Calibration, base line adjustment, drift correction with alternation of sample and standard in optical path
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1806—Biological oxygen demand [BOD] or chemical oxygen demand [COD]

Definitions

  • the invention relates to a device for monitoring parameters of an aqueous liquid, in particular wastewater, comprising a measuring chamber with a supply line for the liquid to be examined and a discharge, an optical measuring arrangement with at least one optical sensor for measuring at least one optical property of the liquid, and a Control and evaluation, wherein the optical measuring arrangement comprises a first optical sensor and a second optical sensor, wherein the first optical sensor, a first light source which emits UV light, a first photodetector and a first extending between the first light source and the first photodetector first Measuring path, wherein the second optical sensor comprises a second light source emitting visible light, a second photodetector and extending between the second light source and the second photodetector second measuring path, wherein the first and the second Meßp fad through the measuring chamber and the liquid therein, the supply line or the outlet at least one valve means, by which at least one cleaning fluid is supplied into the measuring chamber, the device at least one pumping means for conducting the liquid or the at
  • BOD is a relative parameter of the amount of oxygen consumed in the oxidative degradation of water constituents by the microorganisms present in the effluent within a specified time, usually 5 hours.
  • the BOD is thus a parameter for biodegradable organic substances.
  • the color of the water, such as DOC (dissolved organic carbon) can be characterized by the spectral absorption coefficient at a wavelength of 436 nm (SAK 436 [1 / m]), which also gives rise to the Huminstoffbelastung.
  • SAK 436 [1 / m] the spectral absorption coefficient at a wavelength of 436 nm
  • decentralized small wastewater treatment plants are used for wastewater treatment, as these regions often can not be connected to large municipal water treatment plants for technical or financial reasons.
  • Small wastewater treatment plants require government-mandated controls to ensure that the plant is operating properly, as well as compliance with maintenance rules.
  • the controls are usually carried out by the operator himself, as a regular inspection by maintenance and service companies is associated with ongoing costs due to the long travel distances.
  • control devices based on the principle of spectrophotometry have been developed and with which important parameters of wastewater analysis can be continuously determined and monitored by the operator himself.
  • a device has become known with which wastewater parameters such as nitrate or spectral absorption coefficients are determined spectrophotometrically by passing a light beam through a measuring chamber and detecting it.
  • wastewater parameters such as nitrate or spectral absorption coefficients are determined spectrophotometrically by passing a light beam through a measuring chamber and detecting it.
  • a reference absorber in the form of a solid is introduced into the measuring chamber.
  • the cleaning of the components is relatively cumbersome because not only the measuring chamber, but also the reference absorber must be cleaned regularly to avoid biofilm formation and to generate meaningful readings.
  • the GB 2 256 043 A discloses a control device including a channel through which the liquid to be examined flows and a plurality of sensors arranged along the channel, including optical sensors, for measuring liquid properties. Due to the fluid turbulences occurring in the channel, it can be easier to foul the channel inner walls. To compensate for the associated sensor drift, it is proposed to recalibrate the sensor at periodic intervals. A reference measurement is not performed, which results in the need for costly temperature compensation. The cleaning of the device is done manually.
  • the EP 0 724 718 describes a device for measuring properties of a liquid, the device including a channel through which the liquid flows and a plurality of sensors arranged along the channel, including optical sensors, for measuring the liquid properties.
  • the cross-sectional shape of the channel changes depending on the respectively arranged sensor.
  • a device-consuming cleaning mechanism in the form of a moving along the channel spray head is provided.
  • the DE 102 28 929 A1 discloses an apparatus for the photometric measurement of the content of a chemical substance in a measuring solution, in particular for the measurement of nitrate and dissolved organic substances.
  • the device has a flash lamp as the light source as well two receiving units, which receive the transmitted through the measurement solution radiation.
  • the light of the flashlamp is regulated depending on the measured intensity values.
  • a turbidity meter for the outlet of sewage treatment plants, which has an optical sensor for measuring the turbidity in the infrared range.
  • the device also has UV LEDs to counteract the formation of biofilms in the measuring section of the turbidity meter by means of UV light.
  • the DE 10 2004 063 720 describes a control device for wastewater, which has a sensor by which a quality parameter of the waste water can be determined and transmitted as an electronic signal has.
  • the DE 69227764 T2 describes a monitoring device as mentioned for measuring organic impurities in a liquid.
  • An apparatus and method for monitoring parameters of liquid samples is disclosed.
  • the EP 1962089 B1 discloses a disposable probe for temperature and fluorescence measurements in sub-sea environment.
  • the known devices are characterized by a relatively high expenditure on equipment, a complex measurement process and a complicated cleaning mechanism and require short maintenance intervals, which results in significant disadvantages in terms of their mobility, their cost and ease of use.
  • the control devices currently available on the market for small wastewater treatment plant operators are very expensive to purchase.
  • the device should be based on a simple measuring method and in particular allow an operator of a small sewage treatment plant to perform the prescribed controls efficiently and to fix existing functional problems targeted, with low costs and in the short term. It is therefore an object of the invention to meet this need.
  • control and evaluation device is set up to carry out reference measurements on the basis of the measuring chamber filled with cleaning fluid.
  • a monitoring device is provided with which parameters of an aqueous liquid, in particular wastewater, user-friendly and can be determined maintenance and cost-effective, so that the safe operation of water treatment plants, especially small sewage treatment plants, and the proper control of the technological processes taking place reliably becomes.
  • the invention also facilitates the lawful implementation of legal requirements, especially for operators of small wastewater treatment plants.
  • Current legal sources for Austria are, for example, the EU Water Framework Directive 2000/60 / EC, the Water Law and the Austrian Drinking Water Ordinance.
  • the control and evaluation device is adapted to perform reference measurements based on the filled with cleaning fluid measuring chamber.
  • the cleaning fluid is used directly as a reference liquid and thereby allows a very simple and inexpensive apparatus design of the device according to the invention.
  • optically pure water is used as the cleaning fluid and thus as the reference fluid.
  • optically pure water of quality 1 according to DIN ISO 3696 (water for analytical purposes), which is prepared for example by a membrane filter of pore size 0.1 microns for about 1 h in distilled or deionized water is soaked and then filter about 1 liter of distilled or deionized water through the prepared filter.
  • aqueous liquid refers primarily to all types of water such as sewage, river and lake water, technical process waters, as well as drinking water, mineral water and water, which is provided for drinking water production.
  • the term refers to wastewater, the term “wastewater” also including purified waste water or clarified waste water (clear water).
  • cleaning fluid refers to reagents and cleaning agents that are suitable for preventing biofilm formation in the measuring chamber and in its supply and discharge lines.
  • the cleaning fluid may be, for example, water, preferably optically pure water, distilled water, ion-free water, germ-free water, a disinfectant, alcohol or an osmotic solution, e.g. Osmosis water with a conductivity of ⁇ 20 ⁇ S, be.
  • pumping means and valve means (valve) used herein refer to pumps or valves which are suitable for use in a fluid-carrying line system and which are to be presumed to be known to the person skilled in the art.
  • the pumping means / pump may be, for example, a diaphragm pump.
  • the valve means / valve may for example be realized as a solenoid valve or as a pneumatic valve.
  • the pump and valve means are controllable by the control and evaluation device in a conventional manner.
  • the valve means (valve) for supplying the cleaning fluid is preferably arranged in the supply line.
  • the cleaning fluid (possibly also several different cleaning fluids) is located in a refillable cleaning container for the cleaning fluid and can be guided by means of the at least one pumping means (pump) via the valve means from the cleaning container into the supply line and on through the measuring chamber and the discharge.
  • pump pumping means
  • valve means is arranged in the drain, then the cleaning fluid from the refillable cleaning container is guided by means of the pumping means via the valve means in the discharge and on through the measuring chamber in the supply line.
  • the device is normally anchored in the immediate vicinity of the sampling point for the aqueous liquid to be examined, for example, in the water inlet or drainage of a water management system.
  • the device can be fixed, for example by means of cable ties or the like to existing components of the water management system.
  • the supply line and, if appropriate, the discharge thereby dip into the body of water from which the liquid sample to be examined is taken.
  • the sample inlet opening of the supply line is in arranged at a defined distance to the water surface. To comply with this distance can be attached to the supply line a float (float).
  • the first light source emits UV light with a wavelength of 254 nm and the second light source emits visible light with a wavelength of 550 nm.
  • the liquid in the measuring chamber is consequently illuminated with UV light at 254 nm and with visible light at 550 nm (to compensate for undissolved water constituents) and the transmitted light intensity is measured by means of the photodetectors and converted into an electrical signal.
  • the SAK 254 is calculated according to a known manner, from which in turn the COD and the BOD can be derived.
  • the evaluation of the measurement results is carried out according to the invention by the control and evaluation and is explained in more detail below in the examples.
  • the measurement at 550 nm is normally not necessary, since drinking water typically contains no undissolved constituents.
  • the control and evaluation unit can be programmed so that only the measurement is performed at 254 nm and the measurement at 550 nm is omitted.
  • the optical measuring arrangement has a third optical sensor which has a third light source emitting visible light, a third photodetector and a third measuring path extending between the third light source and the third photodetector, the third measuring path passes through the measuring chamber and the liquid therein.
  • the third light source For the determination of the coloration of the liquid, which is characterized by the spectral absorption coefficient at a wavelength of 436 nm (SAK 436 in [1 / m]), it is therefore expedient for the third light source to emit visible light with a wavelength of 436 nm .
  • the SAK 436 can also be used as a parameter for DOC and thus also for the Huminstoffbelastung.
  • the device can be implemented particularly easily if the first, the second and the third light source have a wavelength-specific LED (Light Emitting Diode). LEDs also have the advantage of longer shelf life than the flashlamps otherwise commonly used in photometry.
  • the LED of the first light source emits UV light of a wavelength of 254 nm and the LED of the second light source visible light of a wavelength of 550 nm.
  • a third optical sensor is provided, then it is advantageous if the LED of the first light source UV light of a wavelength of 254 nm, the LED of the second light source visible light of a wavelength of 550 nm and the LED of the third light source emitted visible light of a wavelength of 436 nm.
  • the first light source can also be a UV low-pressure lamp (for example from Heraeus Noblelight).
  • a beam splitter is arranged between the first light source and the measuring chamber, which diverts a portion of the UV light emitted by the first light source into a reference measuring path and a reference photodetector supplies.
  • the beam splitter is preferably realized as a semitransparent mirror. For example, approximately 30% of the light for the reference measurement is branched off into a reference measurement path and fed to a reference detector by the beam splitter.
  • the first, second and third photodetectors and the reference detector can each comprise a photoelectric element, in particular a photodiode, which generates an electrical signal corresponding to the detected light intensity and feeds this to the control and evaluation unit.
  • the photodetectors used have the lowest possible bandwidth or are only sensitive to the corresponding wavelength.
  • the first photodetector and the reference detector may be of the type BPW21 (Siemens), the second photodetector of the type TW30SX (Texas Instruments) and the third photodetector of the type OSD15-5T (OSI Optoelectronics).
  • the mentioned detectors can also be followed by a known manner, a preamplifier for amplifying the electrical signal.
  • a bandpass filter is arranged in the first measuring path at a position between the first light source and the first photodetector.
  • the bandwidth depends on the optical components used and results from the intensity characteristic of the first light source, the transmission characteristic of the measuring chamber and the optionally existing beam splitter and the sensitivity characteristic of the first photodetector.
  • devices are preferred that give a low bandwidth, it is also possible thanks to this development to use components that bring a larger bandwidth with it.
  • the device comprises a transmission unit, e.g. a GSM module, for transmitting the determined and / or evaluated measured values to an external receiver.
  • a transmission unit e.g. a GSM module
  • the external receiver is for example a mobile phone or a computer.
  • the measured data can be transmitted via SMS, for example.
  • the device may further comprise an operator console for inputting commands for the control and evaluation device, for example for programming the measurement sequence and its time sequence.
  • the control panel may further comprise a display for displaying the commands or the measurement and identification data or a touchscreen.
  • the device for power supply to a replaceable power supply module for example, commercially available dry batteries, on.
  • the device for battery level control is further associated with an alarm device which triggers an alarm signal with little or a failure of the power supply.
  • the alarm device may be part of the control and evaluation or a separate component.
  • an alarm signal is transmitted as described above, when the level falls below a predetermined limit.
  • the device may also be associated with a temperature sensor (temperature sensor), which is preferably located in the vicinity of the measuring chamber and is in signal communication with the control and evaluation device. Temperature deviations that exceed a predefinable temperature range can also be transmitted as an alarm signal as described above.
  • a temperature sensor temperature sensor
  • the at least one valve means is arranged in the supply line and the device has a backwash valve which is located in the supply line at a position between the at least one valve means and the measuring chamber is arranged and from which a backwash line extends to the supply line, wherein the backwash line opens at a position upstream of the at least one valve means in the supply line.
  • At least one reference measurement is carried out by determining the optical properties of the cleaning fluid located in the measuring chamber before step a) by means of the first and second optical sensors, and optionally by means of the third optical sensor.
  • the cleaning fluid is used directly as a reference liquid and thereby enables a very simple and inexpensive apparatus design of the device according to the invention.
  • step c) the supply line of the measuring chamber is backwashed by means of at least one cleaning fluid.
  • specific water parameters eg COD, BOD, DOC, coloration / humic substance loading
  • the Fig. 1 shows a schematic block diagram of an inventive device 100 for monitoring parameters of a water sample from a water management system.
  • a water sample from a water body 111 eg drinking water or wastewater
  • a measuring chamber 121 assigned to an optical measuring device 104 (see detailed view in FIG Fig. 2 and 3 ) and from there via a derivative 105 again transported back into the water line 102.
  • the supply line 101 and the discharge line 105 dive stationary into the water body 111 of the water line 102 and are anchored there.
  • the water line 102 is in particular a sewer, but may also be a drinking water line.
  • the water sample passes via a sample inlet opening 101a into the feed line 101.
  • the sample inlet opening is preferably arranged in the water body 111 at a defined distance from the water surface 111a.
  • a floating body (float), not shown, may be fastened to the supply line 101 in a manner known per se.
  • the optical measuring device 104 further comprises an optical measuring arrangement consisting of a plurality of optical sensors, which are arranged on the measuring chamber 121 (optical sensors 104a, 104b, 104c; Fig. 2 and 3 and description below).
  • the diaphragm pump 103 is arranged in the supply line 101. Further, in the supply line 101, a suction valve 107 and a backwash valve 108 are arranged.
  • the intake valve 107 is located upstream of the diaphragm pump 103, ie in a section of the supply line 101 lying upstream of the diaphragm pump 103.
  • the backwash valve 108 is located in a section of the supply line 101 between the diaphragm pump 103 and the measuring device 104.
  • the device 100 also has a cleaning container 109 for a cleaning liquid, which can be passed from the cleaning container 109 via the suction valve 107 into the supply line 101 and from there into the measuring chamber 121 and the discharge line 105.
  • the device 100 also has a backwash line 110, which extends from the backwash valve 108 into the supply line 101 and opens at a position upstream of the intake valve 107 into the supply line 101.
  • the diaphragm pump 103, the intake valve 107, the backwash valve 108 and the optical measuring device 104 are connected via control and signal lines (a), (b), (c) and (d) to a control and evaluation device 112 for measuring sequence control and for measuring data evaluation , which is mounted on a motherboard 115 in this example.
  • the intake valve 107 and the backwash valve 108 may be realized, for example, as controlled 3/2-way solenoid valves or as controlled pneumatic valves and are controlled by the control and evaluation device 112.
  • the optical sensors 104a, 104b, 104c described in detail below can be activated independently of one another by the control and evaluation device 112.
  • the control and evaluation device 112 is constructed in a manner known per se and typically has a microcontroller and electronic components.
  • the device 100 is also associated with a transmission unit 114 for remote transmission of data, which in the in the Fig. 1 example shown is a GSM module.
  • a transmission unit 114 for remote transmission of data, which in the in the Fig. 1 example shown is a GSM module.
  • the transmission unit 114 the determined and / or evaluated measured values are transmitted to an external receiver (not shown), which in the present example is a mobile telephone or a computer.
  • the measurement data are transmitted via the transmission device 114 by SMS to a mobile phone.
  • a control panel 116 for inputting commands for the control and evaluation 112 is arranged.
  • commands include, for example, the programming of the measurement procedure and the measurement timing scheme.
  • the control panel 116 has a display 117 for displaying the commands, measurement and / or operating status, and a keypad 118 for inputting data (measurement procedure, measurement time schedule, data transmission schedule, telephone number, pincode of the SIM card, etc.).
  • the control panel 116 may include a touch screen.
  • the components of the device 100 described above are housed in a watertight housing 119 which is e.g. made of PVC (polyvinyl chloride) is arranged.
  • the waterproof case 119 has a sealed supply port 119a and a sealed discharge port 119b through which the supply line 101 and the discharge passage 105, respectively, extend out of the waterproof case 119 into the water body 111 of the water passage 102.
  • the device 100 can be fixed, for example by means of cable ties or the like to existing components of the water management system.
  • the device 100 is a power supply module 113, e.g. in the form of commercially available dry batteries, assigned.
  • the apparatus 100 for battery level control is further associated with an alarm device which triggers an alarm signal in case of low or a failure of the power supply.
  • the alarm device may be part of the control and evaluation device 112 or a separate component. Malfunctions in the power supply can be made available to the operator of the water management system by means of an acoustic signal, an indication on the display 117 or by the transmission of information by means of the transmission device 114 to the external receiver, e.g. in the form of an SMS to a mobile phone.
  • the apparatus 100 may further be associated with a temperature sensor 120, which is located advantageously in the vicinity of the measuring chamber 121 and is in signal communication with the control and evaluation device 112. Temperature deviations that exceed a predefinable temperature range can also be transmitted as an alarm signal as described above.
  • Fig. 2 shows an enlarged schematic sectional view of the optical measuring device 104 of the Fig. 1 (in supervision).
  • the optical measuring device 104 comprises the already mentioned measuring chamber 121, which can be filled with the water sample to be measured or with cleaning fluid as described above.
  • the measuring chamber 121 shown is a flow cell which is permeable to UV light and which is made of quartz glass or plastic, for example.
  • the optical measuring device 104 further comprises an optical measuring arrangement, which consists of a plurality of optical sensors, which are arranged outside of the measuring chamber 121 at this.
  • the first optical sensor 104a has as light source a controlled UV LED 122 with a peak intensity of 254 nm and a first photodiode 123 for measuring the light intensity which is transmitted through the liquid (water sample, reference liquid) in the measuring chamber 104.
  • the second optical sensor 104b has as a light source a controlled LED 125 with a peak intensity of 550 nm (visible light in the green region) and a second photodiode 126 for measuring the light intensity passing through the one located in the measuring chamber 104 Liquid (water sample, reference liquid) is transmitted, on.
  • the measuring device 104 further comprises a third optical sensor 104a which uses as a light source a controlled LED 128 with a peak intensity at 436 nm (visible light in the blue region). and a third photodiode 129 for measuring the light intensity transmitted through the liquid (water sample, reference liquid) in the measuring chamber 104.
  • the measuring paths that run between the respective LEDs 122, 125, 128 and the photodiodes 123, 126 and 129 are marked with arrows.
  • the measuring chamber 121 and the optical components described above are embedded in a plastic block (shown as a hatched rectangle), wherein the light channels through which the measuring paths extend are milled into the plastic block.
  • the LEDs 122, 125, 128 and the photodiodes 123, 126, 129, 131 are externally interchangeable.
  • the LEDs 122, 125 and 128 are controlled by the control and evaluation unit 112 in a manner known per se via signal connections (h), (i) and (j).
  • the Fig. 2 moreover, shows an advantageous development of the measuring device 104.
  • a beam splitter 133 in the form of a semitransparent mirror is arranged in the measuring path between the UV LED 122 and the measuring chamber 121, which branches off about 30% of the UV light emitted by the UV LED 122 in a reference measuring path and the reference photodiode 131 supplies.
  • the measuring device 104 which is also in Fig. 2 comprises a bandpass filter 137 arranged between the measuring chamber 121 and the first photodiode 123.
  • the bandpass filter 137 By means of the bandpass filter 137, erroneous measurements due to a too large bandwidth can be excluded.
  • the bandwidth depends on the optical components used and results from the intensity characteristic of the first light source, the transmission characteristic of the measuring chamber and the optionally existing beam splitter and the sensitivity characteristic of the first photoelectrode.
  • the light intensities detected by the first, second and third photodiodes 123, 126 and 129 and by the reference photodiode 131 are converted in a manner known per se into corresponding electrical signals, which are subsequently connected in measuring amplifiers 124, 127, 130 and 132, which are connected downstream of the photodiodes , amplified and fed via signal connections (k) of the control and evaluation device 112 for the further measurement data evaluation.
  • Fig. 3 shows a further enlarged schematic sectional view of the measuring device 104 of the Fig. 1 (in side view), the section through the top in Fig. 2 described optical components of the first optical sensor 104a (UV LED 122, beam splitter 133, first photodiode 123, measuring amplifier 124, light channel 134) and the measuring chamber 121 leads.
  • the first optical sensor 104a UV LED 122, beam splitter 133, first photodiode 123, measuring amplifier 124, light channel 134
  • the measuring chamber 121 leads.
  • Fig. 4 to 7 illustrate the steps of a measurement procedure based on the representation of the essential device components of the Fig. 1 , wherein the flow direction of the flowing through the lines 101, 105, 110 and the measuring chamber 121 of the device 100 water sample (in the present example is wastewater) or cleaning fluid and the valve positions of the suction valve 107 and the backwash valve 108 by arrows are.
  • water sample in the present example is wastewater
  • cleaning fluid in the present example is wastewater
  • the measuring chamber 121 is pre-rinsed with the cleaning liquid.
  • the cleaning liquid from the cleaning container 109 is conducted via the supply line 101 into the measuring chamber 121 of the measuring device 104 at corresponding valve positions of the suction valve 107 and the backwash valve 108 and from there via the discharge line 105 into the water line 102.
  • reference measurements zero measurements at the wavelengths 254 nm, 550 nm and optionally at 436 nm are carried out for calibration by means of the first, second and third optical sensors 104a, 104b, 104c.
  • the reference measurement with the cleaning fluid can also compensate for temperature influences.
  • the cleaning liquid thus serves simultaneously as a reference liquid, which is preferably optically pure Water acts.
  • the optically pure water may have a DIN DIN standard no. 38404-3 / July 2005 corresponding quality according to DIN ISO 3639.
  • the waste water sample from the water body 111 of the water pipe 102 into the measuring chamber 121 (see detailed view in FIG Fig. 2 and 3 ) of the measuring device 104 and from there via the discharge line 105 back into the water line 102 passed.
  • the optical properties of the water sample at the wavelengths 254 nm, 550 nm and possibly 436 nm are analogous to the above-described reference measurement by means of the first, second and third optical sensors 104a, 104b, 104c determined photometrically.
  • the measurement of the optical properties in cleaning liquid or in waste water with the third sensor 104c at a wavelength of 436 nm for the determination of the DOC is optional. If the water sample to be examined is drinking or groundwater, the DOC can also be used to draw conclusions about the coloration / humic substance load.
  • the reference intensity of the UV-LED 122 of the first optical sensor is additionally measured with the reference photodiode 131 to compensate for variations in the intensity of the UV-LED 122.
  • the reference measurement in cleaning fluid and the measurement of the wastewater sample is usually carried out by cyclic scanning of the individual photodiodes. For example, a total of 256 cycles are performed and the measured values are averaged. The measuring time amounts to a total of about 1 second. The result is an integer value of 0 - 1000, which represents the light intensity.
  • reference intensity refers to the light intensity measured with the reference photoelectrode 131.
  • the device 100 is aligned for the photometric monitoring of effluent parameters such as the COD or BOD5 due to the above-described sensors 104a, 104b, 104c.
  • effluent parameters such as the COD or BOD5
  • it can also be used for photometric monitoring of drinking water parameters, with drinking water measuring at a wavelength of 550 nm can be omitted, since drinking water usually has no undissolved constituents.
  • the corresponding sensors 104a, 104b, 104c can be independently controlled / activated by the control and evaluation device 112 depending on the water sample to be examined (for example waste water, drinking water).
  • the measuring chamber 112 of the measuring device 104 and the lines 101, 105 are rinsed with cleaning liquid and cleaned to eliminate impurities and counter biofilm formation.
  • the valve positions of the intake valve 107 and the backwash valve 108 correspond to those of the Fig. 4 ,
  • the cleaning liquid passed through corresponding valve position of the backwash valve 108 in the backwash line 110 and further into the supply line 101.
  • the section of the supply line 101 which lies upstream of the intake valve 107, ie substantially between the intake valve 107 and the water line 102, is therefore flushed with cleaning fluid in a flow direction opposite to the flow direction of the withdrawn water sample (cf. Fig. 5 ) cleaned.
  • Fig. 8 shows a flowchart of the in the Fig. 4 to 7 described measuring sequence including menu structure for the command input and with reference to the in Fig. 1 illustrated keypad 118.
  • the in the Fig. 4 to 8 The measurement procedure described can be activated at desired times of the day via a programmed time schedule that can be programmed by inputting commands in the control console 116. Usually the measurements are carried out at regular intervals at certain times and / or on certain days. Outside the time schedule, an immediate measurement can be performed.
  • the device 100 is preferably in power-saving mode.
  • the power supply of the pump 103, the valves 107, 108, the display on the display 117 and the peripheral components (GSM modem, measuring amplifier, etc.) is turned off.

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EP13196915.6A 2012-12-18 2013-12-12 Dispositif de surveillance optique d'un paramètre d'un échantillon de liquide Withdrawn EP2746751A1 (fr)

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DE201210112541 DE102012112541A1 (de) 2012-12-18 2012-12-18 Vorrichtung zur optischen Überwachung eines Parameters einer Flüssigkeitsprobe
AT505982012A AT513774B1 (de) 2012-12-18 2012-12-18 Vorrichtung und Verfahren zur optischen Überwachung eines Parameters einer Flüssigkeitsprobe

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106290763A (zh) * 2016-07-29 2017-01-04 湖南永清水务有限公司 一种污水处理运行参数趋势分析方法及系统
CN106546542A (zh) * 2016-10-27 2017-03-29 深圳市清时捷科技有限公司 实现检测项目自定义的水质检测装置及方法
WO2018149934A1 (fr) * 2017-02-17 2018-08-23 Otek Engineering Jerzy Domeracki Procédé et dispositif pour le nettoyage d'un canal à l'aide d'un module de pompe à membrane
EP3816335A1 (fr) * 2019-10-29 2021-05-05 E.G.O. Elektro-Gerätebau GmbH Dispositif capteur, procédé de fonctionnement d'un tel dispositif capteur et appareil électroménager à circulation d'eau
CN112834450A (zh) * 2020-12-31 2021-05-25 剑科云智(深圳)科技有限公司 一种传感器、污水测定的系统和方法
WO2022185311A1 (fr) * 2021-03-04 2022-09-09 Maytronics Ltd. Systèmes et procédés pour la surveillance de fluide d'une installation de fluide ayant un sous-système d'inspection pour l'inspection de sources de lumière utilisées dans le système de surveillance
WO2024099257A1 (fr) * 2022-11-08 2024-05-16 赛默飞世尔（上海）仪器有限公司 Spectrophotomètre, unité de nettoyage et procédé de nettoyage de spectrophotomètre

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003091A1 (fr) * 1985-11-19 1987-05-21 Consilium Marine Ab Procede et appareil pour detecter la concentration de polluants dans un liquide
WO1992016828A2 (fr) * 1991-03-19 1992-10-01 Welsh Water Enterprises Ltd. Dispositif de controle de polluants organiques
EP0985920A1 (fr) * 1998-09-11 2000-03-15 Naphtachimie Procédé et dispositif de contrôle de qualité d'effluents

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003091A1 (fr) * 1985-11-19 1987-05-21 Consilium Marine Ab Procede et appareil pour detecter la concentration de polluants dans un liquide
WO1992016828A2 (fr) * 1991-03-19 1992-10-01 Welsh Water Enterprises Ltd. Dispositif de controle de polluants organiques
EP0985920A1 (fr) * 1998-09-11 2000-03-15 Naphtachimie Procédé et dispositif de contrôle de qualité d'effluents

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106290763A (zh) * 2016-07-29 2017-01-04 湖南永清水务有限公司 一种污水处理运行参数趋势分析方法及系统
CN106546542A (zh) * 2016-10-27 2017-03-29 深圳市清时捷科技有限公司 实现检测项目自定义的水质检测装置及方法
WO2018149934A1 (fr) * 2017-02-17 2018-08-23 Otek Engineering Jerzy Domeracki Procédé et dispositif pour le nettoyage d'un canal à l'aide d'un module de pompe à membrane
CN110506162A (zh) * 2017-02-17 2019-11-26 奥特克工程耶日多马拉基公司 使用隔膜泵模块来清洁通道的方法和装置
CN110506162B (zh) * 2017-02-17 2022-04-29 奥特克工程耶日多马拉基公司 使用隔膜泵模块来清洁通道的方法和装置
US11697139B2 (en) 2017-02-17 2023-07-11 Otek Engineering Jerzy Domeracki Method and device for cleaning a channel using a diaphragm pump module
EP3816335A1 (fr) * 2019-10-29 2021-05-05 E.G.O. Elektro-Gerätebau GmbH Dispositif capteur, procédé de fonctionnement d'un tel dispositif capteur et appareil électroménager à circulation d'eau
CN112834450A (zh) * 2020-12-31 2021-05-25 剑科云智(深圳)科技有限公司 一种传感器、污水测定的系统和方法
CN112834450B (zh) * 2020-12-31 2024-04-16 剑科云智(深圳)科技有限公司 一种传感器、污水测定的系统和方法
WO2022185311A1 (fr) * 2021-03-04 2022-09-09 Maytronics Ltd. Systèmes et procédés pour la surveillance de fluide d'une installation de fluide ayant un sous-système d'inspection pour l'inspection de sources de lumière utilisées dans le système de surveillance
WO2024099257A1 (fr) * 2022-11-08 2024-05-16 赛默飞世尔（上海）仪器有限公司 Spectrophotomètre, unité de nettoyage et procédé de nettoyage de spectrophotomètre

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